Sancha was the daughter of unknown parents. The date and place of her birth have not been found.
Her husband was Fernando Pérez de Trava. They were married, but the date and place have not been found. Their four known children were María Fernández (?-?), Gonzalo Fernández (?-?), Urraca Fernández (?-?) and Guiomar Fernandez (?-?).
Note 1
hija del conde Gonzalo Ansúrez y Urraca Bermúdez
Note 2
hija del conde Gonzalo Peláez y Mayor Muñoz